Retractable Aluminum Alloy Cycling Bike Rear Seat Post Rack

Features:
High-quality aluminum alloy construction, sturdy and durable.
Supports up to 20lbs (9kg).
Adjustable to fit different bikes, retracted for easy storage.
Quick-release mounting system, no tools required.
Fits seatpost within 32mm. Use the included rubber pads for smaller seatpost.
Allow you to transport your cargo with ease and efficiency, perfect for use with panniers, backpacks, baskets, etc.